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Issue 19, 2021
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Ground- and excited-state dynamic control of an anion receptor by hydrostatic pressure

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Abstract

Stimulus-responsive supramolecular architectures have become an attractive alternative to conventional ones for many applications in sensing, drug-delivery and switchable memory systems. Herein, we used an anion receptor (H: host) as a hydrostatic-pressure-manipulatable fluorescence foldamer and halide anions as chiral (binaphthylammonium) and achiral (tetrabutylammonium) ion pairs (SS or RR·X and TBA·X; X = Cl, Br), and then investigated their (chir)optical properties and molecular recognition behavior under hydrostatic pressures. The conformational changes and optical properties of H in various organic solvents were revealed by UV/vis absorption and fluorescence spectra and fluorescence lifetimes upon hydrostatic pressurization. The anion-recognition abilities of H upon interactions with SS or RR·X and TBA·X at different pressure ranges were determined by hydrostatic-pressure spectroscopy to quantitatively afford the binding constant (Kanion) and apparent reaction volume changes Image ID:d1sc00664a-t1.gif. The results obtained indicate that hydrostatic pressure as well as solvation plays significant roles in the dynamic control of the present supramolecular system in the ground and excited states. This work will provide a new guideline for further developing hydrostatic-pressure-responsive foldamers and supramolecular materials.

Graphical abstract: Ground- and excited-state dynamic control of an anion receptor by hydrostatic pressure

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Supplementary files

Article information


Submitted
03 Feb 2021
Accepted
31 Mar 2021
First published
15 Apr 2021

This article is Open Access
All publication charges for this article have been paid for by the Royal Society of Chemistry

Chem. Sci., 2021,12, 6691-6698
Article type
Edge Article

Ground- and excited-state dynamic control of an anion receptor by hydrostatic pressure

T. Kinoshita, Y. Haketa, H. Maeda and G. Fukuhara, Chem. Sci., 2021, 12, 6691 DOI: 10.1039/D1SC00664A

This article is licensed under a Creative Commons Attribution 3.0 Unported Licence. You can use material from this article in other publications without requesting further permissions from the RSC, provided that the correct acknowledgement is given.

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